Ratings 
  
  | Year       | 
  Rank   | 
   Edo    | 
  Dev.   | 
  Games  | 
 
  | 1926  | 
  84  | 
  2393 |  (50) |   16 | 
 
  | 1927  | 
  83  | 
  2400 |  (46) |   14 | 
 
  | 1928  | 
  96  | 
  2394 |  (50) |   11 | 
 
  | 1929  | 
  95  | 
  2398 |  (62) |   5 | 
 
  
Rating table notes
 
 | 
| Biographical data |  
   | Name: Chwojnik, Mieczysław   | 
 
   |    Also known as: Moishe Chwojnik; Menachem Oren |  
   | Born: 1902 | 
 
   | Died: 1 Dec. 1962 | 
 
|   |  
   | Notes: | 
 
   | Moishe Chwojnik seems to have changed his name at some point to Menachem Oren, probably after moving to Israel. Gaige gives his year of birth as 1903. The Szachy w Polsce website gives his year of birth as 1902. | 
 
  |  
|   |  
   | References | 
 
| Books |  
   |    Di Felice, Chess Results, 1921-1930, page 333 | 
 
   |    Gaige, Chess Personalia, page 72, 312 | 
 
   |    Thulin, Name index to CTC, page 48 | 
 
| Web |  
   |    Bartelski, Wojciech.  [2nd Chess Olympiad: The Hague 1928 - Poland] | 
 
   |    Jahr, Przemysław.  [Mieczysław Chwojnik] | 
 
 
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